Pump



May 25 1926. v

R. HILDEBRAND PUMP Filed August 16, 1924 4 fro/ways Patented May 25,1926. 1

UNITED smiles PATENT QFFICEQ,

REINHARD HILDEBRAND, or 'wniasrnn onovns, MISSOURI, Assienon IO FULTONmogv wonxs COMPANY, or sit. LOUIS, ivirssoimnn CORPORATION or DELAWARE.

PUMP.

This invention relates to improvements in puinps,and the novel featuresmay be used in a pump adapted to deliver fuel'to an internal combustionengine. To illustrate the invention, I have shown a fuelfeeding pumpadapted to supply liquid fuel to an engine of the Diesel type, but itparts hereinafter more specifically described and illustrated in theaccompanying draw= ings, wherein is shown the preferred em--.

However, it is bodiment of the invention. to be understood that theinvention comprehends changes, variations and modifications which comewithin thescope of the claims hereunto appended. j

The preferred form of the invention comprises a socket joint throughwhich motion is transmitted in one direction from an oscillatory thrustmember to a slidable memher, and a spring whereby the slidable mem-' heris returned, the spring being adapted to maintain the contactiug facesof the joint in firm engagement with each other. The slidable memberherein shown is provided with a striking face adapted to strike anabutment through which motion is transmitted to the pump plunger, andanadditional spring is shown to return said plunger. As an illustrationof a suitable lubricating system I have shown a groove formed in theperiphery of said slidable member and'passageways leading from saidgroove to said striking face and also to the contacting faces of thesocket joint. The slidable member is mounted in a guide provided with.an oil passageway leading,

to said groove. The socket joint is lubri- :ated to avoid undue frictionand the str king face is supplied with oilto provide a' cushion whichreduces the noise at this point.

Fig.

Iis a vertical section illustrating Application filed August 16, 1924.Serial No. 732,491.

a. portion of an engine provided with a pump embodying the featuresofthis invention. N

Fig. II is'a horizontal section on the line ll--II in Fig. I.

The pump herein shown comprises a cylindrical pump chamber 1 confinedbetween a guide 2 and a cover 3, the latter having a discharge port" 4-leading to a discharge pipe 0. p V T he pump plunger 6. is in the formof a tube provided with a longitudinal passage I for the'admissionofliquid fuel to the pump chamber '1 and having an inlet valve 8 at itsupper end ,to prevent return flow of the liquid. 9 designates a springtending to retain the inlet valve on its seat. A discharge valve 10 islocated in the discharge passage 4t to prevent return of the liquidto'thepuinp chamber. The liquid to be pumped is supplied through a pipe11 leading to an annular recess 12 formed around the. tubular plunger 6,the latterhavingports 13 communicating with said recess to admit theliquid to the inlet passage 7 in the plunger. i l f -To illustrate asuitable means for recipro-v eating the pump'plungei', I have shown aneccentric 17 on a rotary shaft 18, an oscil. latory thrust rod 19 with aforked lower end straddling and contacting with the Po riphery of s'ai deccentric and having a curved upper end 20 seated in asoeket :21 formedin a crossl'iead 22, the latterv having a striking linger 23 adapted toengage an abutment member 24extending from a collar 2-4: at the lowerend of the plunger A spring 25 is interposed between the abutment collar24 and ashoulder 26 to serve as means for restoring the plunger. Torestore the crosshead a spring '27 is interposed between a shoulder'2Son thecrosshead and a threadedtube 30 which serves as a stop to limitthe downward motion of the plunger. The

V threaded tube is adjustable vertically to vary, the stroke of theplunger, thereby varyingthe quantity of liquid to be discharged from thepump. v The socket 21in the crosshead 22 has an arcuate face contactingwith and conforming to the curved face at the upper end of thrust rod19, and the restoring spring 27 retains these faces in contact with eachother. This spring also retains the forked lower end of the rod 19 incontact with the eccentric 17, so it is not necessary to attach said rod19 to the crosshead nor to the eccentric.

At the beginning of each upward stroke of the eccentric, the crosshead22slides upwardly in a guide 31 and the striking finger 23 moves towardthe abutment 24. During the middle portion of this stroke, the top faceof finger 23 strikes said abutment to actuate the pump plunger and forcethe liquid through the discharge port 4 Thereafter, the crosshead 22 andthrust rod 19 are restored by the spring 27, while the spring moves theplunger downwardly until the collar 2i engages the adjustable tube 80.

During each upward stroke of the plunger, the inlet valve 8 is closedand liquid is drawn from the pipe 11 to the interior of the plunger, andduring each downward stroke the discharge valve 10 is closed while theinlet valve 8 is open to admit the liquid to the pump chamber 1.

Lubricating oil is supplied to the periphery of the crosshead 22 andalso to the arcuate faces of the socket joint, as well as to the topface of the striking linger 23 where it serves as a cushion or silencer.The crosshead is provided with a peripheral groove 32 and an internalpassageway 33 having a branch 34; extending downwardly to the arcuatefaces of the socket joint, and a branch 34 extending upwardly to the topface of the strik ingfinger 23. The oil is supplied through a passageway35 formed in the guide 31 and having an enlarged discharge end 36 at thegroove 32 in the periphery of the cross-- head. Oil is thus supplied tothe outer face of the slidable crosshead which contacts with the guide,and at the same time a stream of the oil passes through the passageway38 to lubricate the socket joint and the striking face at the top offinger A3. The upper end of the thrust member 19 is provided with threepassageways as shown at 37 in Figs. I and II diverging from each otherand leading to the contacting faces of the socket joint, so as todistribute the oil, said passageways being adapted to communicate withthe passageway 34, as shown in Fig. I.

I claim:

1. A pump provided with operating means including a slidable member, aguide in which said slidable member is mounted, an oscillatory thrustmember, said slidable member being provided with a socket havingan'arcuate face, one end of said thrust member being provided with aconvex face contacting with and conforming to said arcuate face, saidslidable member having a groove in its peripheral face and an internalpassageway leading from said groove to said contacting faces, saidthrust member having diverging pasagcways leading to said contactingfaces and adaptedto communicate with said internal passageway, and saidguide being provided with alubricant passageway leading to said groove.

2. A pump provided with operating means including a driven member, adriving member adapted to strike said driven member to transmit motionthereto, said driving member being movable toward and away from saiddriven member, and means whereby lubricant is supplied to the strikingface of said driving member.

3. A pump provided with a plunger having an abutment, a slidable memberhaving striking face adapted to strike said abutment to actuate saidplunger, and a guide in which said sl'dable member is mounted, saidslidable member having a passageway leading from said guide to saidstriking face, and said guide being provided with a lubricant passagewayleading to the first mentioned passageway.

A pump provided with a plunger hav ing an abutment, a spring adapted tomove said plunger in one direction, a crosshead adapted to move saidplunger in the opposite direction, a guide in which said crosshead isslidably mounted, said crosshead having an extended striking membermovable toward and away from said abutment and provided with a strikingface adapted to strike said abutment to acuate the plunger, saidcrossl-ead having an internal. passageway leading from said guide tosaidstriking face, and said guide being provided with a lubricant passagewayleading to said internal passageway.

5. A pump provided with a plunger having an abutment, a slidable memberhaving a strikin face adauted to strike said abut-- ment to actuate saidplunger, a guide in which said slidable member is mounted, and anoscillatory thrust member adapted to actuate said slidable member, saidthrust member and slidable member having concentric faces contactingwitheach other, said slidable member being provided with a peripheral grooveand internal passageways leading from said groove to concentric facesandalso to said striking face, and said guide being provided with alubricant passageway leading to said groove.

In testimony that I claim the foregoing I hereunto aflix my signature.

REINHARD HILDEBRAND.

